# INFT 940 -- Design Project #2

## Robust Analysis and Design

INFT 940, Spring 1997,
Assigned 3/27/97, Due 5/8/97

- A system and its compensator are described by the transfer functions shown below.
The normal unity gain negative feedback configuraton is used around the series
combination of
*Gc(s)Gp(s)*. The parameter in the system, *Me & T0*,
are fixed in value. Two of the compensator parameters, *Km & Kp* are fixed; limits
for the other two, *Kd & T1*, are to be determined.

- The design goal for the project is to determine limits on the values of
*Kd & T1*
such that all the closed-loop poles fall within the region **D** defined below
for all values of *Kd & T1* in the range. Robust stability is defined in that
context. You do not have to rigorously maximize the ranges of values for *Kd & T1*,
but the goal is for them to be "as large as possible", consistent with robust stability.
The ranges may be non-unique.

- Make use of the Edge Theorem and/or other topics from the course to determine your
compensator limits and to graphically verify robust stability for your system. Investigate
the closed-loop step response at each of the extreme points and at least one interior
point in the ranges of
*Kd & T1*.

- Document your design in a typed report. Include plots as necessary to support your
discussion and to verify your design. Assuming that the actual compensator will be
implemented with fixed values for
*Kd & T1*, discuss what values within your range
that you would recommend using.

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*Latest revision was made on 05/08/01 08:32 PM
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